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One way to think of a fraction is as a division that hasn't been done yet. Why do we even use fractions? Why don't we just divide the two numbers and use the decimal instead? In this day of cheap calculators, that's a very good question. Fractions were invented long before decimal numbers, as a way of showing portions less than 1, and they're still hanging around. They're used in cooking, in building, in sewing, in the stock market - they're everywhere, and we need to understand them. Just to review, the number above the bar is called the numerator, and the number below the bar is called the denominator. We can read this fraction as three-fourths, three over four, or three divided by four.
Yes one is fraction, if there is no denomitor, means, one is the denominator so one is fraction number